JPS5491889A - Throw-away type drill - Google Patents

Throw-away type drill

Info

Publication number
JPS5491889A
JPS5491889A JP15839577A JP15839577A JPS5491889A JP S5491889 A JPS5491889 A JP S5491889A JP 15839577 A JP15839577 A JP 15839577A JP 15839577 A JP15839577 A JP 15839577A JP S5491889 A JPS5491889 A JP S5491889A
Authority
JP
Japan
Prior art keywords
tip
drill
cutting blade
nose
holes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15839577A
Other languages
Japanese (ja)
Inventor
Seiji Nakatani
Hideo Fukagawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP15839577A priority Critical patent/JPS5491889A/en
Publication of JPS5491889A publication Critical patent/JPS5491889A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)

Abstract

PURPOSE:For making holes with high accuracy, to balance the longitudinal force of cutting resistance by placing first and second tips, taking an approximate distance of 180 deg. there-between, and tilting said tips in opposite directions to each other. CONSTITUTION:One 31 of the four edges 31 of a first tip 3 tilts at the angles of 60- 85 deg. with the rotary shaft 7 of a drill 1 or cutting blade for cutting the inside of holes. The nose-round portion 32 adjacent to said cutting blade 31 positions at the very tip of said drill 1, and the virtual point thereof exists at the rotation center 7 of said drill 1. In the meanwhile, a second tip 4 has an almost 180 deg. phase difference from said first tip 3. The outside of said holes is alloted to said second tip 4, and said cutting blade 41 tilts at angle B (about 85 deg.-89 deg.30') with the rotary shaft of said drill 1. The inner one 43 of the two nose-round portions between which said cutting blade 41 is palced positions axially forward and diametrically inward of the outermost-circumferential nose-round portion of said first tip 3. In the meanwhile, the outer one 42 is set to the position for determining the diameter of a hole to be cut.
JP15839577A 1977-12-28 1977-12-28 Throw-away type drill Pending JPS5491889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15839577A JPS5491889A (en) 1977-12-28 1977-12-28 Throw-away type drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15839577A JPS5491889A (en) 1977-12-28 1977-12-28 Throw-away type drill

Publications (1)

Publication Number Publication Date
JPS5491889A true JPS5491889A (en) 1979-07-20

Family

ID=15670790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15839577A Pending JPS5491889A (en) 1977-12-28 1977-12-28 Throw-away type drill

Country Status (1)

Country Link
JP (1) JPS5491889A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02172611A (en) * 1988-12-15 1990-07-04 Montanwerke Walter Gmbh Rotary drill
EP2711115A4 (en) * 2011-05-16 2014-10-15 Drill head for deep hole cutting
EP2167262B2 (en) † 2007-06-14 2018-10-31 TaeguTec Ltd. Drill with cutting inserts

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02172611A (en) * 1988-12-15 1990-07-04 Montanwerke Walter Gmbh Rotary drill
EP2167262B2 (en) † 2007-06-14 2018-10-31 TaeguTec Ltd. Drill with cutting inserts
EP2711115A4 (en) * 2011-05-16 2014-10-15 Drill head for deep hole cutting

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Legal Events

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